CN102104130B - Secondary battery - Google Patents

Secondary battery Download PDF

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Publication number
CN102104130B
CN102104130B CN201010573454.XA CN201010573454A CN102104130B CN 102104130 B CN102104130 B CN 102104130B CN 201010573454 A CN201010573454 A CN 201010573454A CN 102104130 B CN102104130 B CN 102104130B
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Prior art keywords
layer
ground floor
electrode tabs
secondary cell
lead
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CN201010573454.XA
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CN102104130A (en
Inventor
文大渊
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Publication of CN102104130A publication Critical patent/CN102104130A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/528Fixed electrical connections, i.e. not intended for disconnection
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

A secondary battery including a bare cell. The bare cell includes an exposed electrode tab and a lead line welded to the electrode tab and configured to electrically connect the bare cell to a device electrically connected to the lead line. The lead line includes a welding region and a lead region excluding the welding region. The lead line is welded to the electrode tab in the welding region. The welding region includes a first layer and a second layer. The second layer has a higher electrical conductivity than the first layer.

Description

Secondary cell
The application requires to be submitted on November 27th, 2009 priority and the rights and interests of the 10-2009-0115967 korean patent application of Department of Intellectual Property of Korea S, and the full content of this application is contained in this by reference.
Technical field
Embodiment relates to a kind of secondary cell.
Embodiment
In the following detailed description, only illustrate and described specific embodiment of the present invention in the mode illustrating.As those skilled in the art will recognize that, the present invention can implement in many different forms, and should not be understood to be confined to embodiment set forth herein.Identical label represents identical element in whole specification.
Fig. 1 is the perspective view illustrating according to the secondary cell of embodiment.Fig. 2 is the perspective view that a part for the secondary cell of Fig. 1 is shown.
See figures.1.and.2, secondary cell 1000 comprises plain battery 100, is electrically connected to the protective circuit plate 200 of plain battery 100 and plain battery 100 is electrically connected to the lead-in wire 300 of protective circuit plate 200.
As shown in Figure 2, plain battery 100 comprises protection member 110 and is stored in the electrode assemblie 120 in protection member 110.
Protection member 110 comprises main body 112 and lid 114.
Main body 112 comprises holding portion 112a and hermetic unit 112b, and holding portion 112a is the space for hold electrodes assembly 120, and hermetic unit 112b extends from the outward opening of holding portion 112a.
The edge of the lid 114 hermetic unit 112b from main body 112 extends.The holding portion 112a of lid 114 complete main body covered 112 also forms sealing with the hermetic unit 112b of main body 112.Therefore, lid 114 comprises the holding portion area of coverage 114a corresponding with the holding portion 112a of main body 112 and the hermetic unit 114b corresponding with the hermetic unit 112b of main body 112.
Therefore, by electrode assemblie 120 being stored in the holding portion 112a of main body 112, cover 114 by utilization and cover holding portion 112a and carry out the hermetic unit 112b of sealed body 112 by the hermetic unit 114b of the method utilization lid 114 with suitable, thus formation secondary cell 1000.The example that is used to form the suitable method of the sealing between the hermetic unit 112b of main body 112 and the hermetic unit 114b of lid 114 is thermal weld, but is not limited to this.
In the time that electrode assemblie 120 is stored in holding portion 112a, or when being stored in holding portion 112a, electrolyte is injected in holding portion 112a, electrode assemblie 120 is immersed in electrolyte.After storage electrode assembly 120 seal protection member 110, first electrode tabs 124 of extending from electrode assemblie 120 and the second electrode tabs 125 are exposed to outside protection member 110.
Electrode assemblie 120 comprises the first battery lead plate 121, the second battery lead plate 122 and separator 123.
Because separator 123 is arranged between the first battery lead plate 121 and the second battery lead plate 122, so electrode assemblie 120 has the structure that the first battery lead plate 121 and the second battery lead plate 122 insulate.
Electrode assemblie 120 can be gel rolling electrode assemblie, wherein, first by stacking seriatim to the first battery lead plate 121, separator 123 and the second battery lead plate 122, then reels with jelly-roll shape as shown in Figure 2.In another embodiment, electrode assemblie 120 is stack electrode assemblie alternatively, and wherein, the first battery lead plate 121, separator 123 and the second battery lead plate 122 are repeatedly stacking.
Electrode assemblie 120 comprises the first electrode tabs 124 that is connected to the first battery lead plate 121 and the second electrode tabs 125 that is connected to the second battery lead plate 122.The first electrode tabs 124 and the second electrode tabs 125 are exposed to outside protection member 110.
In one embodiment, the first battery lead plate 121 of electrode assemblie 120 is positive plates, and the second battery lead plate 122 is negative plates.In another embodiment, the first battery lead plate 121 is negative plates, and the second battery lead plate 122 is positive plates.
When the first battery lead plate 121 is positive plate and the second battery lead plate 122 while being negative plate, the first electrode tabs 124 is for connecting anodal cathode-chip wiring, and the second electrode tabs 125 is the cathode wiring plates for connecting negative pole.
Plain battery 100 be electrically connected to for charging and discharging or for control store the device such as protective circuit plate 200 (also referred to as protective circuit module 200) at the electrode assemblie 120 of plain battery 100.In current embodiment, for convenience of description, the device that is electrically connected to plain battery 100 is protective circuit module 200, but the invention is not restricted to this.
Protective circuit module 200 can be controlled the operation of charging and discharging and the plain battery 100 of electrode assemblie 120.Protective circuit module 200 comprises control device 210.This device can comprise integrated circuit (IC) device, for prevent overcurrent flow to secondary cell 1000 or protection secondary cell 1000 be not subject to overcurrent impact second protection device 220 and/or secondary cell 1000 is connected to the outside terminal 230 of external device (ED).
In an embodiment of secondary cell 1000, the first electrode tabs 124 and the second electrode tabs 125 that are all exposed to outside plain battery 100 are connected to protective circuit module 200.
In this case, the member that the first electrode tabs 124 and the second electrode tabs 125 is all connected to protective circuit module 200 is lead-in wire 300.The first end of lead-in wire 300 had both been connected to the first electrode tabs 124 of plain battery 100, was also connected to the second electrode tabs 125 of plain battery 100.The second end of lead-in wire 300 is connected to protective circuit module 200.Hereinafter, be not only connected to the first electrode tabs 124 but also be connected to the second electrode tabs 125 lead-in wire 300 first end as shown in Figure 3 A and Figure 3 B.Be described with reference to Fig. 3 A and Fig. 3 B.
Fig. 3 A and Fig. 3 B are the schematic diagrames that the part soldered according to the first electrode tabs 124 of the secondary cell of embodiment, the second electrode tabs 125 and lead-in wire 300 is shown.Specifically, Fig. 3 A is the enlarged drawing that the region A of Fig. 1 is shown.Fig. 3 A shows the first electrode tabs 124, the second electrode tabs 125 and the soldered detailed structure of lead-in wire 300 of the secondary cell 1000 of the description that sees figures.1.and.2.Fig. 3 B is the cutaway view intercepting along the line B-B ' of Fig. 3 A.
With reference to Fig. 3 A and Fig. 3 B, as mentioned above, be exposed to the first electrode tabs 124 outside plain battery 100 and the second electrode tabs 125 and all 300 be connected to protective circuit module 200 by going between.
The first end of lead-in wire 300 is not only connected to the first electrode tabs 124 but also be connected to the second electrode tabs 125.The second end of lead-in wire 300 is connected to the surface of protective circuit module 200.
In Fig. 3 A and Fig. 3 B, show the first end that is not only connected to the first electrode tabs 124 but also is connected to the lead-in wire 300 of the second electrode tabs 125.
Lead-in wire 300 can be divided into First Line 300a and the second line 300b.First Line 300a is connected to the first electrode tabs 124, makes the first electrode tabs 124 be electrically connected to protective circuit module 200 by First Line 300a.The second line 300b is connected to the second electrode tabs 125, makes the second electrode tabs 125 be electrically connected to protective circuit module 200 by the second line 300b.
As shown in Figure 3A, First Line 300a and the second line 300b are separated from each other, make First Line 300a and the second line 300b insulated from each other.
In current embodiment, First Line 300a is physically connected by dielectric film 316 with the second line 300b, to form wall scroll lead-in wire 300.But First Line 300a and the second line 300b can physically separate each other.That is, First Line 300a and the second line 300b can be independent of one another, and physically do not connect by dielectric film 316.
Each ground floor 312 and second layer 314 of comprising in First Line 300a and the second line 300b.
The first electrode tabs 124 is welded to the first surface of the ground floor 312 of First Line 300a, so that the first electrode tabs 124 is electrically connected to protective circuit module 200.Similarly, the second electrode tabs 125 is welded to the first surface of the ground floor 312 of the second line 300b, so that the second electrode tabs 125 is electrically connected to protective circuit module 200.
The second layer 314 is arranged on the second surface of ground floor 312, that is, and and on the relative surface of the first surface with being welded with the first electrode tabs 124 or the second electrode tabs 125 of ground floor 312.
Each can formation by the material with enough welding characteristics in the first electrode tabs 124 and the second electrode tabs 125.The example with the material of enough welding characteristics comprises nickel and nickel-base alloys, but is not limited to this.
Therefore the ground floor 312 that, is welded to the first electrode tabs 124 and the second electrode tabs 125 can be formed by the material having with respect to enough welding characteristics of the first electrode tabs 124 and the second electrode tabs 125.Equally, the example with the material of enough welding characteristics comprises nickel and nickel-base alloys, but is not limited to this.
In order to contribute to use electric resistance welding that the first electrode tabs 124 and the second electrode tabs 125 are welded to corresponding ground floor 312, the second layer 314 can be formed by the material having with respect to the improved electrology characteristic of ground floor 312.
, the second layer 314 can be formed by the high conductivity and the low-resistance material that have with respect to ground floor 312.In other words, ground floor 312 can be formed by the low conductivity and the high-resistance material that have with respect to the second layer 314.
The second layer 314 can be formed by the material that meets above electrology characteristic.The example of this material comprises copper and acid bronze alloy, but is not limited to this.
The thickness of ground floor 312 can be identical with the thickness of the second layer 314.
Each in the second layer 314 has plate shape shape the second surface close contact with corresponding ground floor 312.Dielectric film 316 can be arranged on to each second layer 314 tops to contribute to and the second surface close contact of corresponding ground floor 312, after will in specification, be described in more detail this.In the embodiment shown in Fig. 3 A and Fig. 3 B, each in the second layer 314 has quadrangle form.But in other embodiments of the invention, each in the second layer 314 has such as circular or polygonal arbitrary shape.
Each can being arranged on the second surface of corresponding ground floor 312 with the form applying by any suitable painting method in the second layer 314.The example of suitable painting method includes but not limited to such as the dry cladding process of vacuum sputtering with such as the wet cladding process of solwution method.
Each can being arranged on the second surface of corresponding ground floor 312 with the form of plating by any suitable coating method in the second layer 314.
Can each in the each and second layer 314 in ground floor 312 be set with covering form (clad form)., by the each second surface that is arranged on corresponding ground floor 312 in the second layer 314, then strongly pressurize by the power of for example pressure, so that the second layer 314 forms as one with ground floor 312.This covering formal approach melt from by ground floor 312 and the second layer 314 and the alloy form method of mixing different.In covering form, ground floor 312 is firmly attached to the second layer 314, but ground floor 312 and the second layer 314 all keep material composition separately.
In one embodiment, lead-in wire 300 comprises the each dielectric film 316 in the each and second layer 314 in the ground floor 312 that covers First Line 300a and the second line 300b.In one embodiment, dielectric film 316 is also physically connected to First Line 300a the second line 300b.
Replace the each whole surface in the each and second layer 314 covering in ground floor 312, dielectric film 316 can cover the surface the specific or presumptive area of the each first surface except ground floor 312 in the each and second layer 314 in ground floor 312., dielectric film 316 does not cover the surperficial specific or presumptive area that is welded with the first electrode tabs 124 of ground floor 312 or the surperficial specific or presumptive area that is welded with the second electrode tabs 125 of ground floor 312.In such a way, make to go between 300 and exterior insulation, but each in ground floor 312 can be electrically connected to the first electrode tabs 124 or the second electrode tabs 125 by for example welding.
Specific or the presumptive area that each dielectric film 316 in ground floor 312 does not cover is known as weld zone 320.The remaining area except weld zone 320 of dielectric film 316 is known as lead district 330.
Each area with the welding that contributes to the first electrode tabs 124 or the second electrode tabs 125 in weld zone 320.
As shown at Fig. 3 A, in the time of the whole and corresponding lead district 330 of weld zone 320 corresponding to the each covering in ground floor 312 most of, each in the second layer 314 only covers the relative as far as possible little part of corresponding weld zone 320 and corresponding lead district 330.
That is, in one embodiment, the area of the each area in the second layer 314 and size and corresponding weld zone 320 and measure-alike.Alternatively, the each area in the second layer 314 and size can be greater than area and the size of corresponding weld zone 320, to guarantee covering weld zone 320 completely.In the embodiment shown in Fig. 3 A and Fig. 3 B, the each area in the second layer 314 is greater than the area of corresponding weld zone 320 to guarantee covering weld zone 320 completely.
Fig. 4 is the perspective view illustrating according to the secondary cell of another embodiment.
With reference to Fig. 4, according to an embodiment, secondary cell 2000 has such structure, that is, the secondary cell 1000 of describing referring to figs. 1 through Fig. 3 B is installed in shell 400.
Shell 400 comprises lower house 410 and covers the upper shell 420 of lower house 410.Lower house 410 comprises plain battery holding portion 412 and protective circuit module holding portion 414.
Plain battery holding portion 412 is separated by holding portion partition wall 416 and protective circuit module holding portion 414.
, the embodiment of secondary cell 2000 comprises the plain battery 100 of describing with reference to Fig. 2 and the protective circuit module 200 of describing with reference to Fig. 1.In addition, plain battery 100 is stored in plain battery holding portion 412, and protective circuit module 200 is stored in protective circuit module holding portion 414.
Plain battery is by being connected to protective circuit module 200 with reference to the lead-in wire 300 of Fig. 3 A and Fig. 3 B description.
Lead-in wire 300 is connected to protective circuit module 200 by the welding opening 416a being arranged in holding portion partition wall 416 by plain battery 100.Welding opening 416a contributes to the first electrode tabs 124 of plain battery 100 and the second electrode tabs 125 all to contact and weld with the weld zone 320 of lead-in wire 300 operation of (for example, passing through electric resistance welding method).
; welding opening 416a contributes to be stored in plain battery holding portion 412 and when the second end of lead-in wire 300 is connected to protective circuit module 200 at plain battery 100, lead-in wire 300 is welded to the first electrode tabs 124 and second electrode tabs 125 of plain battery 100.
According to embodiment and consider description above, improve the welding characteristic to electrode tabs by wire bonds.
Although described the present invention in conjunction with specific exemplary embodiment, but it should be understood that, the invention is not restricted to disclosed embodiment, but contrary, the invention is intended to cover various modification and the equivalent arrangements in the spirit and scope that are included in claim and equivalent thereof.
Background technology
Recently,, along with the fast development of electronics industry, communication industry and computer industry, the use of portable electric appts becomes extensively.Rechargeable secondary cell is typically used as the power supply of these portable electric appts.
Conventionally, secondary cell comprises electrode assemblie, electrode assemblie comprise positive pole, negative pole and be arranged on positive pole and negative pole between separator.Electrode assemblie is stored in protection member and is protected.
In this case, secondary cell comprises from anodal and negative pole and extends the electrode tabs (tab) positive pole and negative pole are connected to external device (ED).
Need lead-in wire the electrode tabs of exposure to be connected to the external device (ED) of the protective circuit module of for example controlling secondary cell.In this case, utilize electric resistance welding to fetch electrode tabs is connected to lead-in wire.
The raising of the welding characteristic between electrode tabs and lead-in wire can make the internal resistance of secondary cell reduce.
Summary of the invention
Relating in one aspect to of embodiments of the invention a kind ofly can improve the secondary cell of wire bonds to the welding characteristic of electrode tabs.
According to embodiments of the invention, a kind of secondary cell comprises: plain battery, comprises the electrode tabs of exposure; Lead-in wire, is welded to electrode tabs and is constructed to plain battery is electrically connected to and the device that goes between and be electrically connected.Lead-in wire comprises weld zone and the lead district except weld zone.Lead-in wire is soldered to electrode tabs in weld zone.Weld zone comprises ground floor and the second layer.The conductance of the second layer is higher than the conductance of ground floor.
Lead-in wire can be received electrode tabs by Resistance Welding.
Electrode tabs can be formed by nickel or nickel-base alloy, and ground floor can be formed by nickel or nickel-base alloy, and the second layer can be formed by copper or acid bronze alloy.
The thickness of ground floor can be basic identical with the thickness of the second layer.
The second layer can have plate shape shape and can with the Surface Contact of ground floor.
The second layer can be included in the lip-deep coating of ground floor.
The second layer can be included in the lip-deep coating layer of ground floor.
Can ground floor and the second layer be set with covering form.
Lead-in wire can comprise and is constructed to the dielectric film that at least exposes weld zone and cover at least a portion of lead district.
The area of the second layer can be greater than the area of weld zone.
Brief description of the drawings
Accompanying drawing shows exemplary embodiment of the present invention together with specification, and is used from and explains principle of the present invention with specification one.
Fig. 1 and Fig. 2 are the perspective views illustrating according to the secondary cell of embodiment.
Fig. 3 A and Fig. 3 B are the schematic diagrames illustrating according to multiple electrode tabs of the secondary cell of embodiment and the soldered part that goes between.
Fig. 4 is the perspective view illustrating according to the secondary cell of another embodiment.

Claims (8)

1. a secondary cell, described secondary cell comprises:
Plain battery, comprises the electrode tabs of exposure; And
Lead-in wire, is welded to electrode tabs so that plain battery is electrically connected to device,
Wherein, described lead-in wire comprises:
Ground floor;
The second layer, is formed on a surface of ground floor; And
Dielectric film, covers ground floor and the second layer, and dielectric film is constructed to expose some regions of ground floor, ground floor is divided into the weld zone that does not cover dielectric film and the lead district that is coated with dielectric film,
Wherein, electrode tabs is soldered to the weld zone of ground floor, and the resistance of ground floor is greater than the resistance of the second layer,
Wherein, the area of the second layer is identical with the area of weld zone.
2. secondary cell as claimed in claim 1, wherein, lead-in wire is received electrode tabs by Resistance Welding.
3. secondary cell as claimed in claim 1, wherein, electrode tabs is formed by nickel or nickel-base alloy, and ground floor is formed by nickel or nickel-base alloy, and the second layer is formed by copper or acid bronze alloy.
4. secondary cell as claimed in claim 1, wherein, the thickness of ground floor is identical with the thickness of the second layer.
5. secondary cell as claimed in claim 1, wherein, the second layer has plate shape shape the Surface Contact with ground floor.
6. secondary cell as claimed in claim 1, wherein, the second layer is included in the lip-deep coating of ground floor.
7. secondary cell as claimed in claim 1, wherein, the second layer is included in the lip-deep coating layer of ground floor.
8. secondary cell as claimed in claim 1, wherein, arranges ground floor and the second layer with covering form.
CN201010573454.XA 2009-11-27 2010-11-29 Secondary battery Active CN102104130B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090115967A KR101093894B1 (en) 2009-11-27 2009-11-27 Secondary Battery
KR10-2009-0115967 2009-11-27

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CN102104130A CN102104130A (en) 2011-06-22
CN102104130B true CN102104130B (en) 2014-12-03

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US (1) US20110129717A1 (en)
EP (1) EP2337108B1 (en)
JP (1) JP5269834B2 (en)
KR (1) KR101093894B1 (en)
CN (1) CN102104130B (en)

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JP6395208B2 (en) * 2014-08-08 2018-09-26 セイコーインスツル株式会社 Electrochemical cell, electrochemical cell module, portable device, and method of manufacturing electrochemical cell module
CN205376656U (en) 2016-01-20 2016-07-06 宁德新能源科技有限公司 Secondary battery
KR102083656B1 (en) 2017-02-02 2020-03-02 주식회사 엘지화학 Secontadary battery, and frame for mechanically coupling electrode tap to electrode lead in the secontadary battery
KR102515870B1 (en) * 2017-10-23 2023-03-30 삼성에스디아이 주식회사 Secondary battery
CN108172748A (en) * 2017-12-30 2018-06-15 惠州亿纬锂能股份有限公司 Lug and manufacturing method, the lithium battery and manufacturing method with the lug

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JP2011113963A (en) 2011-06-09
JP5269834B2 (en) 2013-08-21
US20110129717A1 (en) 2011-06-02
EP2337108A1 (en) 2011-06-22
EP2337108B1 (en) 2013-10-23
CN102104130A (en) 2011-06-22
KR20110059285A (en) 2011-06-02
KR101093894B1 (en) 2011-12-13

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